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<div class="elementToProof"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 11pt; color: black; background-color: white;">Dear all, </span></div>
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<span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36); background-color: white;"><br>
On Monday, </span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 14.6667px; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">February 19</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0); background-color: white;"><sup>th</sup></span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36); background-color: white;">,
2024 at 1pm </span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">EST</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36); background-color: white;">,
we will have a </span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">virtual</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0); background-color: white;"> seminar given
by </span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">André Baião Raposo of University of Edinburgh
</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">on the Zoom for Government link: </span></div>
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<div class="elementToProof"><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);"><a href="https://jlab-org.zoomgov.com/j/1619897042?pwd=NzdxWmZCSy9uMTQ1dnBjVVpDaUFiQT09" target="_blank" id="OWAe53ce715-8d61-dc53-df5d-8ed6b5793009" class="OWAAutoLink" rel="noopener noreferrer" data-linkindex="0" data-auth="NotApplicable" style="margin: 0px; background-color: rgb(255, 255, 255); text-align: left;">https://jlab-org.zoomgov.com/j/1619897042?pwd=NzdxWmZCSy9uMTQ1dnBjVVpDaUFiQT09</a></span></div>
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<span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: black;">Please see below for the title and abstract. </span></div>
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<span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b><u>Theory Seminar</u></b>:<b> </b></span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 14.6667px; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">February
19</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0); background-color: white;"><sup>th</sup></span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">, 1pm
</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">EST</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"> (</span><span style="font-family: Calibri, sans-serif; font-size: 14.6667px; color: rgb(36, 36, 36); background-color: rgb(255, 255, 255);">virtual</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);">)</span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36);"><b><u>Speaker</u></b>:
</span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 14.6667px; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">André Baião Raposo</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36);"> (</span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 14.6667px; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">University
of Edinburgh</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36);">) </span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36);"><b><u>Title</u></b>:</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: black;"><b> </b></span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">Two
Troubled Hadrons in a Box: solving left-hand cut issues in the Lüscher scattering formalism</span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: rgb(34, 34, 34); background-color: rgb(255, 255, 255);"> </span></p>
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<span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(36, 36, 36);"><b><u>Abstract</u></b>:</span><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: black;"> </span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: black; background-color: rgb(255, 255, 255);">The
Lüscher formalism is a widely used method in the study of scattering processes through lattice QCD. It allows one to relate</span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: black; background-color: white;"> finite-volume
spectrum information obtained in</span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: black; background-color: rgb(255, 255, 255);"> lattice calculations to scattering amplitudes. Recent lattice results for systems where
a lighter particle can couple to heavier scattering particles (e.g. nucleon-nucleon or DD* scattering) have highlighted the limitations of the standard formalism below the two-particle threshold</span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: black; background-color: white;">.</span><span style="font-family: Calibri, Helvetica, sans-serif; font-size: 11pt; color: black; background-color: rgb(255, 255, 255);"> Due
to the presence of left-hand cuts in the angular-momentum-projected scattering amplitudes, the method leads to inconsistencies if applied far enough below threshold that one hits these cuts. In this talk, I describe an extension of the existing formalism that
circumvents this issue for the nearest left-hand cut and present the full workflow to hence obtain the scattering amplitude.</span></p>
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<span style="font-size: 11pt; color: rgb(36, 36, 36);">See you on Monday. </span></p>
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<span style="font-size: 11pt; color: rgb(36, 36, 36);">Best regards, </span></p>
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<span style="font-size: 11pt; color: rgb(36, 36, 36);">Caroline, Joe, and Zheng-Yang</span></p>
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